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Patented Sept. 20, I898.

G. E. JOHNSON. SUPPORTING ATTACHMENT FOR .CUSPIDUR BOWLS.

(Application file d Dec. 30,1897.)

(No Model.)

WITNESSES:

UNITED STATES PATENT OFFICE.

GEORGE E. JOHNSON, OF FORT WVAYNE, INDIANA, ASSIGNOR TO THE PEERLESSFOUNTAIN CUSPIDOR COMPANY, OF SAME PLACE.

SUPPORTING ATTACHMENT FOR CUSPlDOR-BOWLS.

SPECIFICATION forming part of Letters Patent No. 611,218, datedSeptember 20, 1898.

Application filed December 30, 1897. Serial No. 664,714. (No model.) 7

To all whom it may concern.-

Be it known that I, GEORGE E. JOHNSON, a citizen of the United States,residing at Fort Wayne, in the county of Allen,- in the State ofIndiana, have invented certain new and useful Improvements in SupportingAttachments for Ouspidor-Bowls; and I do hereby declare that thefollowing is a full, clear, and exact description of the invention,which will enable others skilled in the art to which it appertains tomake and use the same, reference being had to the accompanying drawings,which form part of this specification.

In an application filed June 21, 1897, Serial No. 642,066, I havedescribed and claimed a dental cuspidor having a revoluble bowlpivotally mounted within an outer fixed bowl and adapted to be rotatedby an impelling jet of water.

My present invention relates to an improved spider or supportingattachment for the pedestal of said revoluble bowl.

The object of my invention is to provide an improved supportingattachment for said'revoluble bowl and its bearings, whereby said bowlcan readily and conveniently be removed without exposing the oil-bearingof its pivotal support.

My invention consists of an upright supporting-spider detachably mountedon the tubular stem or sleeve for the pivotal supporting-rod for saidbowl, having a proper cone-bearing in the lower end thereof and providedwith a spring-catch adapted to holdingly engage the pedestal of therevoluble bowl when the same is lifted out, thereby carrying with it thesaid spider, said sleeve, and

said pivotal support.

In the accompanying drawings, in which similar reference-numeralsindicate like parts throughout the several views,Figure 1 is a bottomplan of my improvement, showing the peripheral knife-edge-supportingflanges there: on. Fig. 2 is a vertical central section of the sametaken through one of said flanges, showing the said spring-catch and theset-screw by which the said spider is secured to said sleeve. Fig. 3 isa view of my invention in position for use, with its adjacent andsupporting parts shown in vertical central section, and also showing amodified arrangement of the spring-catch. Fig. i is a perspective Viewof a modified form of my invention. Fig. 5 is a plan viewof the samewith the said sleeve omitted. Fig. 6 is a vertical central section ofthe same taken through one of the said peripheral flanges.

All parts of my improvement are made of non-corrosive metal and isformed of a ring 1, having inclined sides, as shown, and a hub 2 inconcentric arrangement with said ring and rigidly united thereto by aplurality of sup porting-legs 3, also in oblique arrangement, as shown,for the purpose hereinafter described. The legs 3 are provided upontheir outer face and preferably throughout their length with aknife-edged flange 4, which also extends across the outer faceof thering 1 to the upper edge thereof, as shown in Figs. at and 6, therebyaffording a longer bearing and giving said spider greater rigidity whenin position. While this knife-edge is not absolutely essential to saidflange, it is preferable, as it presents less area for the collection ofimpurities. The ring 1 may be extended in width to the lower end of saidlegs, thus closing the sides of said spider and leaving the openings 5in the bottom thereof, as shown in Figs. 1 and 2. The preferableconstruction, however, is that shown in Figs. 3, 4, 5, and 6, in whichthe ring 1 is comparatively narrow, leaving the sides of said spideropen for the more ready escape of the waste water.

7 The vertical sleeve 6 has its lower end closed by a propernon-corrosive plug 8, in the top of which the rod 9 forms acone-bearing, Fig. 3, and is preferably provided upon its upper end withan extension 7 of a slightly-increased diameter brazed thereon. On thisextension 7 the hollow hub 2 is adj ustably mounted and firmly fixed inposition'bya proper set-screw 10, which is placed directly below one ofthe legs 3 to present less obstruction to the waste. By arranging theenlarged tubular extension on the upper end of said sleeve 6 it affordsalarger bearing for the upper portion of said rod 15 without decreasingthe size of the annular wasteway in the lower portion of said casting13. At any suitable point within said spider, preferably upon the innerface of the ring 1 and adjacent to the inner face of one of said legs 3,is rigidly fixed a pendent springcatch 11, having upon its free end andouter face a lateral flange adapted to holdingly engage a proper annularflange upon the lower end of the bowl-supporting pedestal 12 for thepurpose hereinafter described. The said spring-catch can obviously bevariously arranged without departing from the scope of my invention. Forexample, it can be slightly modified in construction, have its lower endsoldered or otherwise fixed to the said sleeve 6, and have its upperfree end adapted to engage the said annular flange on said pedestal 12,as shown in Fig. 3.

The hollow castin g 13 is supported by the chair-bracket, of the usualconstruction, (not shown,) and the collar 14 is mounted on said castingby a screw-threaded connection and is adapted to support an outer fixedbowl, all of which is fullydescribed in my above-mentioned application,Serial No. 642,066. ithin the said collar and enlarged top of saidcasting 13 is loosely mounted my invention, with the knife-edgeflangesat thereof bearing upon or in contact with the inner inclined andcoincident faces of said collar and casting. The pedestal 12 for theinner revoluble bowl and the pivotally-supporting rod 15 therefor arealso fully described in said prior application and need not be describedin detail here. This pedestal is revolubly and concentrically arrangedwithin my improvement, leaving a sufiicient annular space about saidpedestal to afford a proper wasteway for the discharge of the wastewater from said bowls.

The operation of my invention thus described is, briefly stated, asfollows: hen my improvement is placed in position, the spring 11normally engages the said annular flange of said pedestal, whereby whenthe operator desires to lift out the said inner revoluble bowl for thepurpose of removing casual obstructions from the annular waste-passagein the lower portion of said casting 13 or for the purpose of cleansingthe outer bowl the said spider and said sleeve 6 will be carried upwardwith it, thereby permitting the ready and convenient removal of saidbowl and its pivotal support without exposing the oil-bearing thereof.Obviously the said innerbowl and supporting-pedestal 12 can readily bedetached from said spider and said sleeve 6 by simply disengaging saidspring 11 from said pedestal.

Having thus described my invention and the manner of employing the same,what I desire to secure by Letters Patent is- 1. In a dental cuspidor ofthe class specified a supporting-spider for the inner revoluble bowl,consisting of a ring and hollow hub in concentric relation, and integral0blique legs rigidly uniting said ring and hub, and whose outer facesare adapted to rest or bear upon the adjacent inclined face of thecontaining casting, the said spider having a holding-spring detachablyconnecting it with the pedestal of said bowl for the purpose specified,all substantially as described.

2. In a dental cuspidor of the class specified a supporting-spider forthe revoluble bowl consisting of a ring and hollow hub rigidly united inconcentric arrangement by a plurality ofobliquelegs; a plurality ofoblique legs uniting said ring and hub, and having upon their outer facea longitudinal knifeedge-supporting flange; and means for detachablyconnecting said spider to the pedestal of said bowl for the purposespecified, all substantially as described.

3. In a dental cuspidor of the class described, the combination of aring 1 and a hub 2 rigidly united in concentric relation by inclinedlegs; the inclined legs 3 integral with said ring and hub and havingtheir outer face provided with a supporting knife-edge for the purposespecified; a bearing-sleeve 6; means for rigidly fixing said hub on saidsleeve; and a spring-catch fixed upon the inner face of said ring andadapted to holdingly engage the pedestal of a proper revoluble bowl forthe purpose specified.

4- In a dental cuspidor of the class described, the hollow casting 13;the collar 14.- mounted upon said casting by a screw-threadedconnection; the supporting-spider consist ing of a ring 1 and a hollowhub 2 rigidly counected in concentric relation by the inclined legs 3;the inclined legs 3, the bearing-sleeve 6 for the purpose specified;means for detachably securing said hub to said sleeve; and means fordetachably connecting said spider with the pedestal of a properrevoluble bowl as described, all substantially as described.

Signed by 1ne,at Fort Wayne, Allen county, State of Indiana, this 24thday of December, A. D. 1897.

GEORGE E. JOHNSON.

\Vitnesscs:

ADELAIDE KEARNS, MINNIE YVEIL.

